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/* vi: set sw=4 ts=4:
*
* ls.c - list files
*
* Copyright 2012 Andre Renaud <andre@bluewatersys.com>
*
* See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ls.htm
USE_LS(NEWTOY(ls, "F1a", TOYFLAG_USR|TOYFLAG_BIN))
config LS
bool "ls"
default y
help
usage: ls [-F] [-a] [-1] [directory...]
list files
-F append a character as a file type indicator
-a list all files
-1 list one file per line
*/
#include "toys.h"
#define FLAG_a 1
#define FLAG_1 2
#define FLAG_F 4
static int dir_filter(const struct dirent *d)
{
/* Skip over the . & .. entries unless -a is given */
if (!(toys.optflags & FLAG_a))
if (d->d_name[0] == '.')
return 0;
return 1;
}
static void do_ls(int fd, char *name)
{
struct dirent **entries;
int nentries;
int i;
int maxwidth = -1;
int ncolumns;
if (strcmp(name, "-") == 0)
name = ".";
nentries = scandir(name, &entries, dir_filter, alphasort);
if (nentries < 0)
perror_exit("ls: cannot access %s'", name);
/* Determine the widest entry so we can flow them properly */
if (!(toys.optflags & FLAG_1)) {
int columns;
char *columns_str;
for (i = 0; i < nentries; i++) {
struct dirent *ent = entries[i];
int width;
width = strlen(ent->d_name);
if (width > maxwidth)
maxwidth = width;
}
/* We always want at least a single space for each entry */
maxwidth++;
if (toys.optflags & FLAG_F)
maxwidth++;
columns_str = getenv("COLUMNS");
columns = columns_str ? atoi(columns_str) : 80;
ncolumns = columns / maxwidth;
}
for (i = 0; i < nentries; i++) {
struct dirent *ent = entries[i];
int len = strlen(ent->d_name);
printf("%s", ent->d_name);
if (toys.optflags & FLAG_F) {
struct stat st;
if (stat(ent->d_name, &st))
perror_exit("Can't stat %s", ent->d_name);
if (S_ISDIR(st.st_mode)) {
printf("/");
len++;
}
if (S_ISREG(st.st_mode) &&
(st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))) {
printf("*");
len++;
}
}
if (toys.optflags & FLAG_1)
printf("\n");
else {
if (i % ncolumns == ncolumns - 1)
printf("\n");
else
printf("%*s", maxwidth - len, "");
}
}
/* Make sure we put at a trailing new line in */
if (!(toys.optflags & FLAG_1) && (i % ncolumns))
printf("\n");
}
void ls_main(void)
{
loopfiles(toys.optargs, do_ls);
}
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